Mode of constructing pike-chambers for stoves



B. F. m. 3. GOLD.

Consturcting Fire Chambers for Grates.

No. 1,689. FatehtedJuly15, 1840.

E27: 60511 116? Jecaoaw Wain/asses UNITED STATES PATENT OFFICE.

B. F. GOLD AND J. S. GOLD, OF NEW YORK COUNTY, NEW YORK.

MODE OF CONSTRUCTING FIRE-CHAMBERS FOR S-TOVES.

Specification of Letters Patent No. 1,689, dated July 15, 1840.

To all whom it may cmwcm:

Be it known that we, B. F. GOLD and J. S. GoLn, of the county and Stateof New York, have invented a new and Improved Mode of ConstructingCast-Iron Chambers of Combustion for Stoves and other Uses, the objectof which is to render them indestructible, besides securing theadvantages of all other modes; and we do hereby declare that thefollowing is a full and exact description of the same as applied to acast-iron cylinder.

Let the pattern of the cylinder be turned or wrought as follows: As itstands on the end, let there be arches or flutes so corresponding insideand out around the cylinder laterally, that it shall be of equalthickness. Equal or nearly equal thickness is important, though notessential. These arches or flutes should measure say one inch across;that is vertically. Scientifically speaking, this measurement is thelength of an arch. The sides of the cylinder thus appear to be formed byuniting the bases or ends of arches; presenting alternately a concaveand a convex surface. The height of each arch measured horizontallyshould be one fourth of an inch; so that an arch presenting a convex,and an arch presenting a concave surface united, will vary the surfacehalf an inch from a line drawn across the tops of the arches. The sidesof the cylinder may be formed entirely of arches convex externally orinternally, so united as to present the scallop appearance. Instead ofarches, angles may be substituted. The thickness of the cylinder shouldbe about one fourth of an inch, but may be thicker or thinner ifdesired, or as the arches are enlarged or diminished. This cylinder iscast after the manner of hollow-ware. The top and bottom of thecylinder, and the tops of the arches that are convex inward, should bein a line, and the cylinder should be a little larger at the bottom thanthe top, say one inch in twelve; so as to let the coal descend withoutobstruction.

The chamber of combustion may be either round, oval, or many sided; asit is not necessary to have a perfect cylinder in order to give effectto the principle in preventing fracture. But if square or any otherform, it will be greatly improved by the arches. Small flutings orcarvings may be added externally, to increase the radiation.

A cast iron chamber of combustion constructed in the above mode hasessential advantages over any other without inferiority in any respect.Its appearanceis equal or better; and it will be seen from the nature ofthe arches, that the combustion will be as good, as there is no passagefor the draft or air, except through the fuel. The chamber is thenimproved, by the additional radiance upon the floor for warming thefeet. At the same time the superfices of the chamber or extent given forthe transmission of caloric will be about one third more than in thecommon form, consequently the same caloric can be transmitted, byheating the chamber to two thirds the intensity; therefore the burningof the iron is prevented. By arches or flutes up and down, there may bethe same extent of surface for the transmission of caloric,which modehas been in usebut the fuel will not burn as well, especially anthracitecoal, and the chamber would still be nearly as liable to fracture fromexpansion as Without the arches or flutes. But in this improvement theadvantage is that the chamber will bear the expansion owing to thearches which will spring without liability to fracture.

By the yielding nature of the arches, and the transmission of the samecaloric through the sides of the chamber with diminished intensity ofheat, owing to the additional extent for this transmissionwithout injuryto the draft, the iron will be rendered far more indestructible,effecting an improvebent which can not be attained by any other mode.

In the above description we mean to be understood to embrace, not onlythe place for the fuel, but any inclosure of cast iron, that is used togenerate or convey heat; where this improvement is applicable andeffective.

Our improvement will be recognized in cast iron chambers constructedwith small arches transverse a large arch or transverse the course ofthe draft or current of heat.

What we claim as new, and wish to secure by Letters Patent as animprovement is The construction of cast iron chambers of combustionsubstantially, as above described, on the principle, and for thepurposes therein mentioned. We claim this improvement, whether appliedto all sides, or to any part of the sides of the chamber.

BENJ. F. GOLD. JOB S. GOLD.

